Which of the following statement(s) is/are true for SN¹ reaction?
I. The rate of SN¹ reaction depends on the concentration of alkyl halide
II. The rate of SN¹ reaction depends on the concentration of nucleophile
III. SN¹ reactions of alkyl halides are favored by non-polar solvents
a) Only I b)Only II c)Only III d)Both I and III